Top gluing mechanism.



E. W. LABOMBARDE.

TOP GLUING MECHANISM.

APPucAnon min nEc.22. Isls.

1 ,271,730. Patend July 9, 1918.

,a0 1S' 313g* 40 j 4g y g5' JINI/*eldor- 44 Eliellaomaluf f inafter descr ELIE W. LABOHBABDE, 0l' NASHUA, NEW HAMPSHIRE.

TOI GLUING MEGHANIBM.

Speculation of Letter: Patent.

Patented July 9, 1918.

Application illed December 22, 1916. Serial No. 188.517.

To all whom it may concern:

Be it known that I, ELIE W. LABoMBAnoE, of Nashua, in the county of Hillsborough and State of New Ham shire, have invented certain new and u ul Improvements in Top Gluing Mechanism, of which the following is a specification.

This invention relates to the mechanism employed for applying an adhesive, which will be hereinafter referred to as lue, for the sake of brevity, to paper b anks prior to the latter being folded to form envelops, boxes, etc.

Usually, in box folding or envelop making machines, the blanks, prior to their being folded, are passed over a wheel which carries glue on its periphery. Sometimes it is preferable to have the lan under, instead of over, the glue wheel. A diiliculty which has t0 be overcome when the blanks are passed under the glue wheel is to prevent the escape of glue from the source of supply, or the excessive use of lue. A further diiculty arises when glue ries on the wheel during stoppage of the machine.

The object of my invention is to provide an improved and simple mechanism for applying a stripe of ue to blanks passin along in contact wit the under ortion o `the periphery of a glue wheel, wlthout liability o there being any excess of glue or waste of glue, during the operation of Ythe machine to which my approved gluing mechanism is a plied.

A further obgect is to provide a device or mechanism of this character which can be easily manipulated to absolutely prevent the eflxape of any glue when the machine is i e.

A further object is` to provide an improved glue wheel mechanism in which the wheel will remain moist when the machine is stopped.

With these and other objects in view, my invention consists in the construction and combination of arts substantially as here- 4 and claimed.

Of the accompanying drawings:

Figure 1 is a side elevation of a top gluing device or mechanism embodying my im provements, the portion of the glue wheel shaft which carries a driving wheel vor sprocket being in section.

Fig. 2 represents a section on lme 22 of Fig. 1.

Fig. 3 represents a section of the device ks passing x on a line such as indicated at 3 3 in Fig. 2 looking in the direction of the arrow.

Fig. 4 represents a detaill section on line 4-4 of Fig. 3, looking in the direction of the arrow.

Similar reference numerals indicate similar arts in all of the views.

T e glue box or receptacle 12 is of any suitable proportion and capacity and 1s preferably provided with a tight-fittin cover 13 having a suitable handle or kno 14. At the ends of the box are ears 15 having openings by means of which the box can be supported in proper l osition on crossrods or shafts of the fol ing machine in y which the gluing device is emplo ed. Said ears are removably secured in p ace as by suitable screws 16.

The box has a longitudinal partition 17 (Fig. 2) to divide the box into a glue cham- 1 ber 18 and a water chamber 19, suitable connections being made, as by means of a pipe 20, to either admit steam into the water chamber or to keep up a constant supply of water in said chamber at a temperature `Sullicient to rovide va r in the closed receptacle to ee the g ue in chamber 18 in a proper con ition of fluid consistency, and to keep the wheel 27 moist.

The bottom of the chamber 18 is slotted as at 21 in order to permit the glue wheel presently described to project below the bottom of the box.

Extending from one wall of the box, through the partition 17, and nearlyr to the opposite wall of the box is a c llndrical bearing 22. Rotatively mounte in said bearing 22 is an eccentric bushinlg 23. A shaft 24 is mountedlin said' bus ing, the outer end having a suitable drive wheel 25 connected thereto, and the inner end having secured to it the hub `26 of the glue wheel 27 Obviously if no. rovision were made to prevent it, glue wou d esca from chamber 18 through the slot" 21. o prevent such escape, and to make provision so that onl a"port1on of the lue wheel will be immerse in lue, I provi e an inclined slotted wall 28 compare Figs. 3 and 4) reaching from the bottom of the box u to the hub 26. Obvviously it might exten farther up. Said wall 28 is slotted to admit the wheel 27. A plate 29 preferably of brass, is secured to the wall 28,-as by means of screws 30. This late 29 1s so accurately slotted that the si es of the same will so closely t the Aes paper, sothat the blanks will contact with sides of the wheel 27 as to revent the assage of glue between the si es of the w eel and the sides of the slot. When the machine is in operation there is a slight space between the ottompf the slot in the brass plate 29 and the periphery of the glue wheel so as to permit a thin film of glue to be carried downwardly by the glue wheel when the latter is revolved in the direction of the arrow in Fig. 3.

The outer end of the eccentric bushing 23, outside of the glue box has clamped thereon ther hub 31 of an arm 32, the latter having a link 33 pivoted to it at 34, the other en of the link having a suitable handle 35. The lower edge of the link 33 is provided with a series of notches 36, either one of which may be engaged with a pin 37 projecting from the outer wall of the box said pin having a attened lines in Fig. 1 to fit one of the notches 36. A spring 38 having one end connected to the link and the other end being connectedto the wall of the box, keeps the link 33 with one of its notches engaged by the in 37..

The means last described enab es me to vary the thickne of the film of glue taken out by the glue wheel, or to completely close the space between the periphery of the Wheel and the bottom of the slot in plate 29. This is because, by means of the link 33 having the handle 35, I can swing the arm 32 so as to rotate the eccentric bushing 33 suiiiciently to finely adjust the vertical position of shaft 24 which carries the glue wheel 27. As has been stated, the sides of the slot in plate 29 fit so closely to the sides of `the glue wheel that no appreciable amount of glue can escape there-between. By rotatively adjusting the eccentric bush- `ing 23, I can either entirely close or vary the space between the periphery of the wheel and the bottom of t e s ot in late 29.

To provide a su port for the blan ses ecially when the atter `are made of t in the portion'of the glue wheel which projects below the bottom ofthe box, I secure a bracket y40 to one side of the box by means of a screw 39, the lower end of said bracket carrying a stud 41 which is provided with a slit for a thin blade or support 42. One end of the stud 41 is screw threaded and is provided with a nut 43 by means of which the stud can be manipulated to permit the blade or plate 42 to be swung nearer or farther from the periphery of the glue wheel, and then clamp 1t in its adjusted position.

Owing to the fact that the top of the box is entirely closed, it is practically impossible for dust or lint to get into the box to mix with the lglue, or for any great amount of vapoi` rising from chamber 19 to escape. Only the lower portion of the wheel is extorn one 21, an

,wheel that are not immersed portion as indicated by dotted4 posed to apply lue to the blanks, another portion of the w eel projecting through the slot of the end Wall 28, 29. The edge which is presented by the bottom of the slot in plate 29 constitutes a doctor which determines the thickness of the film of glue carried past it by the periphery of the wheel, or serves to prevent the passage of any glue when the wheel is not rotating, all according to the degree of adjustment of the wheel toward and from said=doetor.

As the only o ening in the box is the botas said opening is nearly closed or filled by the lower portion oiiathe wheel 27, the `vapor from the warmed water in chamber 19 Ykeeps the glue wheel moist. The vapor has access to all i 1n the glue, and the.Y portion so immersed-comprises only a small sector of the wheel that is bounded by the inclined slotted wall 28 and the level of the surface of the glue in chamber 18. When the machine is stopped, the glue keeps the immersed portion of the wheel from dryin while the vapor which has access to all ot er portions of the wheel prevents the drying of the film of glue which has am hered to said other portions. Consequently the glue Wheel never accumulates a coatingr of di? glue, during stoppage, which-would inter ere wlth proper operation when the machine is started again to run.

The inclined slotted wall 28 is tangential to a circle surrounding the axis of the glue wheel whereby said wall 'notonly serves to limit the immersed area of the wheel to a smaller sector than if the lower half of the wheel were immersed, but also causes the rotation of the wheel in the direction of the arrow, Fig. 3, to eil'ect a constant stirring `up or circulation of the glue, due to the current produced by the revolving wheel, such current being defiected backwardly by the inclined wall.

Having now described my invention, I claim:

1. In mechanism of the character described, a glue receptacle having a slot, a wheel mounted in the receptacle and haring a prix `..on projecting throughsaid slot, ail other portions of the receptacle being closed, and means for subjecting the wheelto the action of vapor to prevent drying when the wheel is stationary.

2. In mechanism of the `character described, a glue receptacle having a slotted end wall, a wheel having its lower portion exposed and having another portion projecting through the slot of said end wall into the glue receptacle, saidend wall being tangen-` tial to a circle surrounding the axis of the wheel, and means for adjusting the wheel edgewise in said slot.

3. In mechanism of the character described, a glue receptacle, a wheel having yits portions of 'the lower portion exposed, a slotted member through which another portion of the wheel projects, said slotted member being tangential to a circle surrounding the axis of the wheel, the slot of said member having1 its sides closely fitting the sides of the W eel, the end of said slot forming a doctor for the periphery of the wheel, and means for adjusting the Wheel ed ewise in said slot.

4. In mechanism o the character described, a glue receptacle having a slotted end wall, a cylindrical bearing adjacent the upper portion of said end Wall, an eccentric bushing mounted in said bearing, a shaft mounted in said bushing and having a glue wheel a portion of which projects through the slot in said end Wall, a lower portion of said wheel being exposed to apply glue to blanks, and means for rotatively adjusting said eccentric bushing.

5. In mechanism of the character described, a glue receptacle having a slotted end wall, a cylindrical bearing adjacent the upper portion of said end wall, an eccentric bushing mounted in said bearing, a shaft mounted in said bushing and having a glue wheel a portion of which projects through the slot in said end Wall, a lower portion of said wheel being exposed to apply glue to blanks, and means for rotatively adj ustng said eccentric bushing, said means comprising an arm carried by the eccentric bushing,

a link pivoted to said arm, and means for locking said link in either one of a plurality of positions.

` (i. The combination with a glue box having a slot in its bottom, of a glue wheel the lower portion of which projects through said slot, a bracket secured to the side of the box and extending below the plane of said bottom, and a blank-supporting blade adjustably connected with said bracket and extending under the Wheel.

7. The combination with a glue box having a glue wheel the lower portion of which is exposed to apply glue to blanks, of a blank support opposite said lower ortion of the wheel, said support comprising a flexible strip adjustably connected with said box.

8. In mechanism of the character described, a closed receptacle having a glue chamber and a water chamber, said glue chamber having a slotted wall, a wheel having a portion of its periphery extending through said slot, an under portion of the wheel being exposed to apply glue to passing blanks, and means for permitting vapor from 4the water chamber to have constant access to all portions of the wheel not immersed in glue. A 4

In testimony whereof I have aiiixed my signature.

. ELIE W. LABOMBARDE. 

